allow overriding PHP when runnning phpbrew #94
allow overriding PHP when runnning phpbrew #94

```
PHPBREW_OVERRIDE_PHP=/usr/bin/php phpbrew
```

davidfuhr/phpbrew,pinkbigmacmedia/phpbrew,dduca-sugarcrm/phpbrew,phpbrew/phpbrew,wellic/phpbrew,kayyyy/phpbrew,wellic/phpbrew,hechunwen/phpbrew,svetlyak40wt/phpbrew,williamn/phpbrew,mengzyou/phpbrew,mengzyou/phpbrew,pinkbigmacmedia/phpbrew,viniciusferreira/phpbrew,hechunwen/phpbrew,zonuexe/phpbrew,konomae/phpbrew,pinkbigmacmedia/phpbrew,dduca-sugarcrm/phpbrew,kayyyy/phpbrew,davidfuhr/phpbrew,mengzyou/phpbrew,kayyyy/phpbrew,phpbrew/phpbrew,wellic/phpbrew,zonuexe/phpbrew,davidfuhr/phpbrew,svetlyak40wt/phpbrew,dduca-sugarcrm/phpbrew,pierredup/phpbrew,viniciusferreira/phpbrew,svetlyak40wt/phpbrew,williamn/phpbrew,svetlyak40wt/phpbrew,williamn/phpbrew,hechunwen/phpbrew,mengzyou/phpbrew,davidfuhr/phpbrew,morozov/phpbrew,konomae/phpbrew,dduca-sugarcrm/phpbrew,williamn/phpbrew,zonuexe/phpbrew,pierredup/phpbrew,hechunwen/phpbrew,davidfuhr/phpbrew,kayyyy/phpbrew,pierredup/phpbrew,pinkbigmacmedia/phpbrew,viniciusferreira/phpbrew,pierredup/phpbrew,phpbrew/phpbrew,viniciusferreira/phpbrew,konomae/phpbrew,zonuexe/phpbrew,wellic/phpbrew,morozov/phpbrew,konomae/phpbrew